MCP ASCII Charts

import { validateChartData, ValidationError } from '../utils/validation.js'; import { McpToolParams } from '../types/index.js'; describe('Validation', () => { test('should validate correct data', () => { const params: McpToolParams = { data: [1, 2, 3, 4, 5], labels: ['A', 'B', 'C', 'D', 'E'], title: 'Test Chart', width: 60, height: 15, color: 'blue' }; const result = validateChartData(params); expect(result.data).toEqual([1, 2, 3, 4, 5]); expect(result.labels).toEqual(['A', 'B', 'C', 'D', 'E']); expect(result.title).toBe('Test Chart'); expect(result.width).toBe(60); expect(result.height).toBe(15); expect(result.color).toBe('blue'); }); test('should apply defaults for optional parameters', () => { const params: McpToolParams = { data: [1, 2, 3] }; const result = validateChartData(params); expect(result.width).toBe(60); expect(result.height).toBe(15); expect(result.color).toBe('white'); }); test('should throw error for missing data', () => { const params = {} as McpToolParams; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('Data must be an array of numbers'); }); test('should throw error for empty data array', () => { const params: McpToolParams = { data: [] }; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('Data array cannot be empty'); }); test('should throw error for invalid data values', () => { const params: McpToolParams = { data: [1, 2, 'invalid', 4] as unknown as number[] }; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('All data values must be valid numbers'); }); test('should throw error for NaN values', () => { const params: McpToolParams = { data: [1, 2, NaN, 4] }; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('All data values must be valid numbers'); }); test('should throw error for mismatched labels length', () => { const params: McpToolParams = { data: [1, 2, 3], labels: ['A', 'B'] // Wrong length }; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('Labels array must have the same length as data array'); }); test('should throw error for invalid width', () => { const params: McpToolParams = { data: [1, 2, 3], width: 5 // Too small }; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('Width must be a number between 10 and 200'); }); test('should throw error for invalid height', () => { const params: McpToolParams = { data: [1, 2, 3], height: 60 // Too large }; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('Height must be a number between 5 and 50'); }); test('should throw error for invalid color', () => { const params: McpToolParams = { data: [1, 2, 3], color: 'invalidcolor' }; expect(() => validateChartData(params)).toThrow(ValidationError); expect(() => validateChartData(params)).toThrow('Invalid color'); }); test('should accept valid colors', () => { const validColors = ['red', 'green', 'blue', 'yellow', 'magenta', 'cyan', 'white']; for (const color of validColors) { const params: McpToolParams = { data: [1, 2, 3], color }; expect(() => validateChartData(params)).not.toThrow(); } }); });